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Hi, yesterday I installed nCad and everything worked fine. I've just started to create simple 2D drawings I registered nCAD following the procedure, with NC35I-A93F1EEDDB8E-03711 sn. Today I tried again, but I've a strange behaviour. As I move the cursor inside the doc window, everything disappears. If I regen or redraw, or if I change some settings on menus, I see the docs I'm editing, but still if I move the cursor to the window, the doc disappears again. For example, if I change the sheet format (A4 o A3, or something) I see the doc into the window. But if I try to draw, moving the cursor there, everything disappears except for the grid, and the axis origin icon. I'm running nCAD onto a HP ProBook 4330s, 4 Gb RAM, Windows 7 64 bit, Intel Core i5-2410M CPU @ 2.30 Ghz 2.30 Ghz, Radeon HD 6490M graphic card

Hi, I have the exact same problem on different hardware. I also tried importing a dwg-file, which seemed to work, but that went invisible as well.....
Would be nice if someone could solve this, as the program is useless this way.

To dario and JMtB:
Please contact our support team support@nanocad.com.
Meanwhile you can try to change OpenGL settings:
Menu 'Tools->Options' then in the dialog 'Application preferences->System settings->Graphics hardware acceleration settings' try to select different setting (Setting 1, Setting 2, Setting 3)

Hello people. I changed my graphics hardware acceleration settings from openGL 2 to openGL 1 and my drawings stopped disappearing. But the whole drawing process slowed down a bit. But that is not much of a problem to a newcomer like me. Thanks for the suggestion.